CATALOG OF ORIGINAL DESCRIPTIONS: Globigerinoides parawoodi Keller 1981

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globigerinoides -> Globigerinoides parawoodi
Other pages this level: << < G. inusitatus, G. italicus, G. japonicus, G. joli, G. kennetti, G. korotkovi, G. kuehni, G. macrostoma, G. minuta, G. mitra, G. muratai, G. nuttalli, G. obliqua, G. obliquus amplus, G. obliquus extremus, G. parawoodi, G. parkerae, G. parva, G. pseudodubia, G. pseudoruber, G. pseudosellii, G. quadrilobatus hystricosus, G. quadrilobatus praeimmaturus, G. quadrilobatus primordius, G. ruber albus, G. ruber parkeri, G. rubra seigliei, G. rubriformis, G. sacculifer brachysacculifer, G. sacculifer minimus, G. sacculifer spinulosus> >>

Globigerinoides parawoodi

Citation: Globigerinoides parawoodi Keller 1981
Rank: Species
Type locality: northwest Pacific, DSDP Site 292.
Type age (chronostrat): foraminiferal Zone N4, Discoaster deflandrei nannofossil Zone
Type sample (& lithostrat): DSDP 292-14-4 (40-44 cm)
Type specimens: 307083 and paratypes 307088, 307089, 307090
Type repository: Washington; USNM

Linked specimens: USNM-307087 USNM-307091 USNM-307085 USNM-307084 USNM-307083 USNM-307086 USNM-307088 USNM-307089 USNM-307090

Current identification/main database link: Globigerinoides italicus Mosna and Vercesi, 1975


Original Description
Test free, a low trochospire with 12- 14 spherical to subspherical chambers arranged in 3-4 whorls. Four chambers in final whorl. Sutures radial and depressed on both umbilical and spiral sides. Umbilicus small. Primary aperture nearly circular with distinct rimlike margin. One small supplementary aperture present at suture junction between ultimate and penultimate chambers.

Size: Maximum diameter 0.45 mm.

Extra details from original publication
Remarks: Globigerinoides parawoodi is similar to Globigerina woodi in all respects except the development of a small supplementary aperture. This species evolves from Globigerina woodi in the upper half of foraminiferal Zone N4 near the first appearance of Globoquadrina dehiscens, Globorotalia zealandica, and G. zealandica incognita. Soon after the evolution of Golbigerinoides parawoodi some members of this population evolve into G. subquadratus by reduction of 1 chamber in the final whorl. A further development toward G. altiaperturus is apparent in the upper third of Zone N4. Later in the Early Miocene (Zones N5- N6?) G. parawoodi appears to evolve into G. bollii by a reduced, heavily encrusted and more compact test size. Globigerinoides parawoodi differs from G. altiaperturus by its small single supplementary aperture, generally smaller primary aperture. and smaller test size.

Stratigraphic range: Foraminiferal Zone N4 (Gioboquadrina dehiscens FA to Zones N5-N6 and possibly Zone N7).

References:

Keller, G. (1981a). Origin and evolution of the genus Globigerinoides in the Early Miocene of the northwestern Pacific, DSDP Site 292. Micropaleontology. 27(3): 293-304. gs

Spezzaferri, S., Olsson, R. K. & Hemleben, C. (2018c). Taxonomy, biostratigraphy, and phylogeny of Oligocene to Lower Miocene Globigerinoides and Trilobatus. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 9): 269-306. gs V O


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Globigerinoides parawoodi compiled by the pforams@mikrotax project team viewed: 18-1-2021

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